Aircraft



FIG. 1 is a first-side elevational view of an aircraft according to the claimed design;

FIG. 2 is a second-side elevational view thereof;

FIG. 3 is a third-side elevational view thereof;

FIG. 4 is a fourth-side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof. 

CLAIM The ornamental design for an aircraft, as shown and described. 